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Ceramic restorations on Discoloured stumps around the gingival tissues

A tooth can discolour for a lot of reasons. If you ask a Sydney dentist about this, you will be advised that teeth could discolour due to age, food, beverage, medications, trauma, dental caries or exposure to highly staining compounds.

A tooth fitted with a porcelain fused to metal crown may stain after prolonged exposure to the metal. This results in an unsightly discoloured stump that often reflects and affects the gum tissue. Teeth with discoloured stumps are very unattractive. It gives the patient a smile that looks dirty, old and diseased, especially since the stained appearance reflects on the soft tissue or gums too.

It is a frustrating problem because even if you place the margins at a subgingival level, the problem still remains. When we encounter a problem like this in the clinic, we suggest a few things to the patient:

1. Internal bleaching. An initial remedy for the discoloured stump that has spread to the gingival tissues is to perform an internal bleaching procedure. This is most appropriate for root canal treated teeth, with effectiveness that is quite unreliable.

2. Opaque restoration. A more definite solution that we provide involves masking or covering the discoloured stump with an opaque restorative material or composite resin. Using Kolor +- Kerr Dental we overlay the darkened area to mask the unappealing area so that it does not reflect on the crowns and on the gum tissues.

This kind of remedy is applicable for root canal treated teeth, teeth receiving dental crowns, bridges and veneers. It may be performed on porcelain-fused-to-metal crowns, all-porcelain crowns or even zirconium crowns. The result you receive is a natural-looking teeth restoration, the appears good as new. The teeth will appear beautiful, healthy and clean.

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The post Ceramic restorations on Discoloured stumps around the gingival tissues appeared first on Sydney Dentist.

Katana Zirconia (Noritake) translucent multi-layered zirconia



When a Sydney dentist is faced with an important cosmetic problem on a patient, one of the things he makes sure to do right is to pick the right shade. This is determined, by matching the existing teeth and making certain that the shade is appropriate to the complexion.


Matching the color and choosing the right shade for the restoration is important because the results and the overall satisfaction of the patient depends on this. A patient comes into a Sydney dentist’s office to get better smile and if the smile does not look natural and even, he will not be happy. The success of every case will rely on how happy the patient is with the results and sometimes it will all be about choosing the right restorative material.

Katana Zirconia

There has always been the concern with veneering porcelain chipping from a traditional zirconia crown, and the use of monotlithic full contour zirconia has recently become extremely popular to a Sydney dentist due to the high physical properties of these materials.

Historically it has always been the veneering (fedspathic) porcelain failing with fracturing or chipping. The trade off was always the poor aesthetics that followed due to the dense polycrystalline structures.

Recently, Noritake has released a full contour zirconia restoration using the new Katana Zirconia ML, a gradational multilayered zirconia disc with four layers of color–35% enamel, 15% of the first gradation layer, 15% of the second gradation layer and 35% dentin–that offers the look of layered porcelain. The pre-colored multilayered shades provide esthetic results without manual dipping or staining and eliminate additional material costs. KATANA Zirconia ML discs are available in three shades: A-Light, A-Dark and B-Light (KATANA HT–a high translucent mono-colored zirconia–is also available in three shades: HT10, HT12 and HT13). So far this material exceeds the aesthetics of other full contour zirconias, so look out for this material.